Mark Hunter: Remember my dear, I can smell a lie like a fart in a car.
Marla Hunter: We think you should see a psychiatrist.
Mark Hunter: Is it that obvious?
Mark Hunter: You see there's nothing to do anymore. Everything decent's been done. All the great themes in life have been used up, turned into theme parks. So I don't really find it exactly cheerful to be living in the middle of a totally exhausted decade where there's nothing to look forward to and no-one to look up to.





Answer: The first time I watched the movie, I kept thinking that Mark's parents were going to hear him and catch "Harry" in the act. When the girl was with Mark, Mark's parents pounded on the outside door; when Mark opened the door, his parents said they thought they heard him talking to someone. So, from outside the garage door, someone might be able to hear muffled voices but not the actual words. Why his parents cannot hear him in the basement when they are indoors lies in the props/scenery plus some inference. The numerous objects in the room (tapes, CDs, albums, guitar, drums, bongo drums, recording instruments, amps, etc.) indicate that Mark is into music - loud music - and electronics. He apparently was given garage/utility storage space to turn into essentially a studio for himself and a place to play his drums and music without disturbing his parents. The space has been sound-proofed - thick concrete walls, insulation, and cloth wall hangings to deaden the sound.
KeyZOid